. (Elec.) A unit, employed in calculating fall of pressure in distributing mains, equivalent to a current of one ampère flowing through one foot of conductor. [ Webster 1913 Suppl. ]
. (Elec.) The quantity of electricity delivered in hour by a current whose average strength is one ampère. It is used as a unit of charge quantity; the Ampere hour is equal to 3600 coulombs. The terms and are sometimes similarly used. [ Webster 1913 Suppl. ]
n.